Looking for resources to put Linux/BSD on tablets

Hey,

I'm looking for a tablet to put linux on and use it for nothing but writing and drawing. And I don't mean running linux/bsd on top of whatever OS the tablet ships with, I mean completely replacing it.

I'm sure this has been done before, and there should be resources for specific devices, but search engines don't really wanna spit those out at me :(

So I just want to find the smallest and cheapest where the process is doable and somewhat decently documented.

Thank you for any and all help!